18 



CHLORIS BOREALI-AMERICANA. 



flower-bud, the anther is usually turned nearly at a right angle 

 with the filament, so that the points which mark the apical fora- 

 mina are lateral. By the time the corolla expands, the anthers 

 have assumed their normal position, and appear pendent from the 

 filament, as is shown in Fig. 7 and Fig. 8. The open pores, if 

 they may be so called, through which the pollen is discharged, 

 are so large, that, like the mouth of a sac or purse, they now oc- 

 cupy the whole summit of the cell. At first, each anther-cell is 

 divided by a transverse septum, the vestiges of which are some- 

 times distinctly visible after the pollen is discharged. The pollen 

 is simple, as in all other Monotropese. But in examining, with the 

 higher powers of the microscope, the pollen taken from autumn 

 flower-buds, I found that what before appeared like simple grains 

 consisted of mother-cells, each containing two, three, or commonly 

 four, distinct pollen-grains. These are shown in Fig. 9, under an 

 amplification of about three hundred diameters. The five-sided 

 umbilicate stigma is apparently composed of five erect and connate 

 lobes. A section of the ovary appears very much as in Monotropa. 

 The thick placental axis projects two lobes into each cell, which are 

 thickly covered with innumerable minute ovules. An apparently 

 fertilized o\Tile, or growing seed, as it appears when strongly mag- 

 nified, is given at Fig. 12. The mature seeds and the fruit are 

 unknown. 



The late Mr. Von Schweinitz, the distinguished botanist who 

 discovered this remarkable plant, sent to Mr. Elliott the brief de- 

 scription published in the work before cited, which is excellent, 

 as far as it goes ; — Mr. Elliott at the same time proposing to 

 change the name Monotropsis, given by Schweinitz, to Schiceinitzia, 

 in honor of the discoverer. In the supplement to his Genera of 

 North American Plants, Mr. Nuttall has somewhat altered, but not 



